I've been homeschooling my DC - years 3 and 4 - and going through the worksheets sent by school. So far, the maths/topic work is generally engaging, fun and seems to be conveyed in the most interesting way possible (considering homeschool limitations).
On the other hand the English/SPAG is really dull and formulaic, and often seems to make little sense to the children! Often long grammatical concepts, lots of re-writing texts. I think it's a shame that things that could be picked up naturally through a love of reading/writing are drilled in this narrow way.
I'm not blaming the teachers for this in any way - I'm aware it's the national curriculum that must be followed, but AIBU to think that this curriculum could be (much) more creative and stimulating?